*{
    margin: 0;
    padding: 0;
}
.warp{
    width: 770px;
    height: 311px;
    position: relative;
}
.list{
    list-style-type: none;
    width: 750px;
    height: 450px;
}
.item{
    width: 100%;
    height: 100%;
    position: absolute;
}
.item:nth-child(1){
    background-image: url(../images/01.jpg);
    background-repeat: no-repeat;
}
.item:nth-child(2){
    background-image: url(../images/02.jpg);
    background-repeat: no-repeat;
}
.item:nth-child(3){
    background-image: url(../images/03.jpg);
    background-repeat: no-repeat;
}
.item:nth-child(4){
    background-image: url(../images/04.jpg);
    background-repeat: no-repeat;
}
.item:nth-child(5){
    background-image: url(../images/05.jpg);
    background-repeat: no-repeat;
}
.item.active{
    z-index: 10;
}
.btn{
    width: 28px;
    height: 60px;
    position: absolute;
    top: 125px;
    background-color: rgba(f, f, f, 0);
    border: none;
    outline: none;
}
#goPre{
    left: 10px;
    z-index: 100;
}
#goNext{
    right: 10px;
    z-index: 100;
}